Number of "Stone deposit" in a mine are variable, from 1 to 4.
If the number is 4, my miners never use them all.
One of them is always 3000/3000: miners do not like it, 3k of stones are useless, and the annoying "Exausthed" voice keeps popping every min.
Mostly my miners keep mining only the same 2 Sources.

I suggest to raise the amount of stones in each "Stone deposit" from 3000 to 6000, cutting by half the total number of "Stone deposit"in each map.
Same amount of stones in each map, but without bugs.